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Daikin FDMQ09RVJU - User Manual

Daikin FDMQ09RVJU
152 pages
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Service
Manual
Inverter Pair
Duct Connected Type
FDMQ-R Series
SiUS071735EB
[Applied Models]
Inverter Pair : Heat Pump

Table of Contents

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Questions and Answers

  • M
    mpughAug 14, 2025
    What to do if the operation lamp is blinking on my Daikin Air Conditioner?
    • C
      Cassidy BatesAug 14, 2025
      If the operation lamp on your Daikin Air Conditioner is blinking, you should first perform the diagnostic procedure. Also, ensure all indoor units connected to a multi-system outdoor unit are set to the same operation mode. If they aren't, set all indoor units to the same operation mode and check if the operation lamp stops blinking. You can also try setting all indoor units to cooling or heating mode to see if the operation lamp returns to normal.
  • D
    David HunterAug 17, 2025
    Why is my Daikin FDMQ09RVJU Air Conditioner cooling effect poor?
    • E
      Erica WheelerAug 17, 2025
      If your Daikin Air Conditioner isn't cooling or heating effectively, try these steps: * Ensure the air filters are clean. * Check for and remove any obstructions blocking the air inlet or outlet of both the indoor and outdoor units. * Verify that the temperature setting is appropriate for your needs. * Make sure all windows and doors are properly closed. * Confirm that the air flow rate and direction are set correctly.
  • M
    Mary GarrettAug 21, 2025
    Why Daikin Air Conditioner does not operate?
    • J
      Justin LeeAug 21, 2025
      If your Daikin Air Conditioner isn't operating and the OPERATION lamp is off, check the following: * Ensure the circuit breaker hasn’t been turned OFF or a fuse hasn't blown. Check the circuit breaker. * Confirm there isn’t a power failure. * Verify that batteries are correctly installed in the remote controller. Install batteries if needed. * Check the timer setting to ensure it is correct.
  • J
    Joshua PowersAug 25, 2025
    How to fix Daikin Air Conditioner if operation does not start soon?
    • C
      Catherine PittsAug 25, 2025
      If your Daikin Air Conditioner operation does not start soon after pressing the ON/OFF button or reselecting the mode, you should wait for about 3 minutes.
  • S
    Stephanie LeAug 28, 2025
    What to do if Daikin FDMQ09RVJU Air Conditioner operation stops suddenly?
    • K
      Kyle MirandaAug 28, 2025
      If the Daikin Air Conditioner operation stops suddenly and the OPERATION lamp is flashing, it could be due to: * Dirty air filters, so clean them. * Obstructions blocking the air inlet or outlet of the indoor or outdoor units, so remove any obstacles. * Inconsistent operation modes for indoor units connected to outdoor units in a multi system, so set all indoor units to the same operation mode.
  • T
    Terri BarkerAug 31, 2025
    Why HEAT operation stops suddenly in Daikin FDMQ09RVJU Air Conditioner?
    • G
      Gabriel WoodsAug 31, 2025
      If the HEAT operation on your Daikin Air Conditioner stops suddenly and you hear a flowing sound, the system is likely removing frost from the outdoor unit. Please wait for approximately 4 to 12 minutes.
  • R
    Rhonda BensonSep 3, 2025
    What to do if Daikin FDMQ09RVJU operation stopped suddenly?
    • L
      lunadanielSep 3, 2025
      If the Daikin Air Conditioner operation stopped suddenly (OPERATION lamp is on), it might be due to a sudden large voltage fluctuation. The system is designed to protect itself and will automatically resume operation in about 3 minutes.
  • P
    pjacksonSep 6, 2025
    Why does no air come out of my Daikin FDMQ09RVJU Air Conditioner?
    • W
      Whitney CaseySep 7, 2025
      If your Daikin Air Conditioner isn't emitting air, especially during HEAT operation or defrosting, allow 1 to 4 minutes for the air to start flowing. If the air conditioner operates immediately after the circuit breaker is turned on, allow 3 to 20 minutes.
  • J
    James DoyleSep 10, 2025
    What to do if Daikin Air Conditioner has an abnormal functioning during operation?
    • K
      Karen RoachSep 10, 2025
      If your Daikin Air Conditioner is malfunctioning during operation, it might be due to lightning or radio waves. Turn the breaker OFF, then turn it ON again, and try operating the air conditioner with the remote controller.

Summary

List of Functions

Functions Overview

Lists available functions for different unit models and controllers.

Product Specifications

Technical Specifications

Detailed technical specifications for indoor and outdoor units.

Safety Precautions

Safety Warnings for Technicians

Crucial safety instructions for personnel performing maintenance and repairs.

Safety Guidelines for Users

Essential safety guidelines for end-users to prevent accidents and damage.

Document Icons Guide

Wiring Diagrams and PCBs

Indoor Unit Wiring and PCB

Wiring diagrams and PCB layout for the indoor unit.

Wired Remote Controller Wiring

Wiring details for the wired remote controller PCB.

Wireless Receiver Wiring

Wiring diagram for the wireless remote controller receiver PCB.

Outdoor Unit Wiring and PCB

Wiring diagrams and PCB layout for the outdoor unit.

System Functions and Control

Core Operational Functions

Overview of primary operational features and controls of the air conditioning system.

Control System Specifications

Detailed explanation of system control logic and operational parameters.

Remote Controller Operations

Wired Remote Controller Operation

Detailed guide to operating and understanding the wired remote controller.

Wireless Remote Controller Operation

Comprehensive instructions for using the wireless remote controller.

Service Diagnosis and Troubleshooting

Common Symptoms and Initial Checks

Common operational issues and initial troubleshooting steps for diagnosis.

LED Indicator Troubleshooting

Guide to diagnosing system errors using LED indicators on indoor and outdoor units.

Remote Controller Diagnostics

Procedures for diagnosing system faults using remote controller displays.

Error Code Troubleshooting

Comprehensive guide to diagnosing and resolving system error codes.

Component Checks

Thermistor Resistance Testing

Procedure for checking thermistor resistance values for diagnostics.

Indoor Fan Motor Connector Inspection

Steps to check the indoor fan motor connector for proper connection.

Power Supply Waveform Analysis

Method for verifying power supply waveforms for system health.

Electronic Expansion Valve Testing

Procedure for testing the functionality of the electronic expansion valve.

Four Way Valve Performance Test

Steps to evaluate the performance of the four-way valve.

Inverter Refrigerant System Check

Procedure for checking the refrigerant system of the inverter unit.

Inverter Analyzer Diagnostics

Using an inverter analyzer for troubleshooting compressor and inverter issues.

Outdoor Fan Motor Inspection

Diagnostic steps for checking the outdoor fan motor.

Installation Condition Verification

Verifying installation conditions to ensure proper system operation.

Discharge Pressure Measurement

Procedure for checking system discharge pressure for performance issues.

Outdoor Fan System Inspection

Comprehensive check of the outdoor fan system's operation.

Main Circuit Short Circuit Test

Method to detect short circuits in the main electrical circuit.

Power Module Testing

Procedure for testing the power module for faults.

Trial Operation and Settings

Pump Down Procedure

Procedure for safely removing refrigerant before relocation or disposal.

Forced Cooling Operation Guide

How to perform a forced cooling operation for specific maintenance tasks.

Trial Operation Procedure

Steps for conducting trial operation to verify system functionality after installation.

Field Settings Adjustment

Guide to adjusting system settings based on installation environment and accessories.

Silicone Grease Application

Proper application of silicone grease for heat dissipation on PCB components.

Appendix and Reference

Piping Diagrams

Visual representations of refrigerant and drain piping connections.

Wiring Diagrams

Electrical wiring schematics for indoor and outdoor units.

Operation Limits Definition

Defines the operational temperature and humidity ranges for the system.

Daikin FDMQ09RVJU Specifications

General IconGeneral
Heating Capacity3.2 kW
RefrigerantR32
Power Supply220-240V, 50Hz
Energy Efficiency Ratio (Cooling)3.5
Outdoor Unit Noise Level48 dB

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